septendecennial

== English == === Etymology === From Latin septendec(im) (“seventeen”) +‎ -ennial, after biennial, septennial, etc. By surface analysis, septen- +‎ decennial. === Pronunciation === IPA(key): /ˌsɛptəndɛˈsɛn.i.əl/ Rhymes: -ɛn.i.əl === Adjective === septendecennial (not comparable) (rare) Occurring every seventeen years; pertaining to or designating a seventeen-year interval. ==== Synonyms ==== heptadecennial (less common) ==== Derived terms ==== ==== Related terms ==== tredecennial centennial biennial, triennial, decennial, millennial ==== See also ==== periodical cicada Magicicada septendecim === References ===